Sanity check to run the Make with proper group permissions

If the `./for-group' script is not used properly, it can lead to the whole
pipeline being re-run. Therefore it is important to do a sanity check
immediately at the start of Make's processing and inform the user if there
is a problem.

With this commit, `./for-group' exports the `reproducible_paper_for_group'
variable which is used by both the initial `./configure' script, and later
in each call to Make. The `./configure' script will use it to write a value
in `reproduce/config/pipeline/LOCAL.mk' and Make will use it to compare
with the value in `reproduce/config/pipeline/LOCAL.mk'.

If there is an inconsistency, Make will not even attempt to build anything
and will just print a message and abort.

1 files changed, 40 insertions, 0 deletions

diff --git a/configure b/configure
index c2ab5e7..df87435 100755
--- a/configure
+++ b/configure
@@ -162,6 +162,34 @@ fi
 
 
 
+# Make sure the group permissions satisfy the previous configuration (if it
+# exists and we don't want to re-write it).
+if [ $rewritepconfig = no ]; then
+   oldforgroup=$(awk '/FOR-GROUP/ && c==0 {c=1; print $3}' $pconf)
+   if [ "x$oldforgroup" = xyes ]; then
+       if [ "x$reproducible_paper_for_group" = x ]; then
+           echo "-----------------------------"
+           echo "!!!!!!!!    ERROR    !!!!!!!!"
+           echo "-----------------------------"
+           echo "Previous pipeline was configured for groups."
+           echo "Either enable re-write, or use './for-group'."
+           exit 1
+       fi
+   else
+       if [ "x$reproducible_paper_for_group" = xyes ]; then
+           echo "-----------------------------"
+           echo "!!!!!!!!    ERROR    !!!!!!!!"
+           echo "-----------------------------"
+           echo "Previous pipeline was not configured for groups."
+           echo "Either enable re-write, or don't use './for-group'."
+           exit 1
+       fi
+   fi
+fi
+
+
+
+
 
 # Identify the downloader tool
 # ----------------------------
@@ -376,11 +404,23 @@ fi
 
 # Write the parameters into the local configuration file.
 if [ $rewritepconfig = yes ]; then
+
+    # Make the pipeline configuration's initial comments.
     create_file_with_notice $pconf
+
+    # Fix the group settings.
+    if [ "x$reproducible_paper_for_group" = xyes ]; then
+        for_group=yes
+    else
+        for_group=no
+    fi
+
+    # Write the values.
     sed -e's|@bdir[@]|'"$bdir"'|'              \
         -e's|@indir[@]|'"$indir"'|'            \
         -e's|@ddir[@]|'"$ddir"'|'              \
         -e's|@downloader[@]|'"$downloader"'|'  \
+        -e's|@forgroup[@]|'"$for_group"'|'     \
         $pconf.in >> $pconf
 else
     # Read the values from existing configuration file.